`<hash_set>`: Natvis errors while debugging

[fsb4000]

Describe the bug
When I was fixing other visualizer issue I found that debugger can't visualize stdext::hash_*

#define _SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS
#include <hash_set>
#include <hash_map>
using namespace std;
int main() {
	stdext::hash_set<int> hs = { 1,2,3 };
	stdext::hash_multiset<int> hms = { 1,1,2,3 };
	stdext::hash_map<int, char> hm = { {1, 'a'}, {2,'b'} };
	stdext::hash_multimap<int , char> hmm = { {1, 'a'}, {1, 'c'}, {2,'b'} };
}

It still looks usable:

Natvis log:

Natvis: C:\Dev\STL\stl\debugger\STL.natvis(1459,65): Error: class "stdext::_Hmap_traits<int,char,stdext::hash_compare<int,std::less<int> >,std::allocator<std::pair<int const ,char> >,0>" has no member "_Mypair"
    Error while evaluating '_Traitsobj._Mypair._Myval2._Myval2' in the context of type 'TestCpp.exe!stdext::hash_map<int,char,stdext::hash_compare<int,std::less<int>>,std::allocator<std::pair<int const ,char>>>'.
Natvis: C:\Dev\STL\stl\debugger\STL.natvis(1447,4): Ignoring visualizer for type 'stdext::hash_map<int,char,stdext::hash_compare<int,std::less<int> >,std::allocator<std::pair<int const ,char> > >' labeled as 'stdext::hash_map<*>' because one or more sub-expressions was invalid.

Natvis: C:\Dev\STL\stl\debugger\STL.natvis(1459,65): Error: class "stdext::_Hmap_traits<int,char,stdext::hash_compare<int,std::less<int> >,std::allocator<std::pair<int const ,char> >,1>" has no member "_Mypair"
    Error while evaluating '_Traitsobj._Mypair._Myval2._Myval2' in the context of type 'TestCpp.exe!stdext::hash_multimap<int,char,stdext::hash_compare<int,std::less<int>>,std::allocator<std::pair<int const ,char>>>'.
Natvis: C:\Dev\STL\stl\debugger\STL.natvis(1447,4): Ignoring visualizer for type 'stdext::hash_multimap<int,char,stdext::hash_compare<int,std::less<int> >,std::allocator<std::pair<int const ,char> > >' labeled as 'stdext::hash_multimap<*>' because one or more sub-expressions was invalid.

Natvis: C:\Dev\STL\stl\debugger\STL.natvis(1459,65): Error: class "stdext::_Hset_traits<int,stdext::hash_compare<int,std::less<int> >,std::allocator<int>,1>" has no member "_Mypair"
    Error while evaluating '_Traitsobj._Mypair._Myval2._Myval2' in the context of type 'TestCpp.exe!stdext::hash_multiset<int,stdext::hash_compare<int,std::less<int>>,std::allocator<int>>'.
Natvis: C:\Dev\STL\stl\debugger\STL.natvis(1447,4): Ignoring visualizer for type 'stdext::hash_multiset<int,stdext::hash_compare<int,std::less<int> >,std::allocator<int> >' labeled as 'stdext::hash_multiset<*>' because one or more sub-expressions was invalid.


Natvis: C:\Dev\STL\stl\debugger\STL.natvis(1459,65): Error: class "stdext::_Hset_traits<int,stdext::hash_compare<int,std::less<int> >,std::allocator<int>,0>" has no member "_Mypair"
    Error while evaluating '_Traitsobj._Mypair._Myval2._Myval2' in the context of type 'TestCpp.exe!stdext::hash_set<int,stdext::hash_compare<int,std::less<int>>,std::allocator<int>>'.
Natvis: C:\Dev\STL\stl\debugger\STL.natvis(1447,4): Ignoring visualizer for type 'stdext::hash_set<int,stdext::hash_compare<int,std::less<int> >,std::allocator<int> >' labeled as 'stdext::hash_set<*>' because one or more sub-expressions was invalid.